title: Polarized neutron reflectivity study of a thermally treated MnIr/CoFe exchange bias system.
abstract: It has recently been found that the exchange bias of a MnIr/CoFe system can be increased significantly by adding a thermal treatment to the bilayer. To reveal the origin of the higher exchange bias, we performed polarized neutron reflectivity measurements at the JRR-3 neutron source. The magnetization vector near the MnIr/CoFe interface for thermally treated samples differed from that for samples without the treatment. We propose a model in which the pinned spin area at the interface is extended due to the increased roughness and atomic interdiffusion that result from the thermal treatment.
authors.affiliation: Device Integration Technologies Laboratory, Fujitsu Laboratories, Ltd, 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan. awaji.naoki@jp.fujitsu.com
authors.forename: Naoki
authors.initials: N
authors.lastname: Awaji
authors.forename: Toyoo
authors.initials: T
authors.lastname: Miyajima
authors.forename: Shuuichi
authors.initials: S
authors.lastname: Doi
authors.forename: Kenji
authors.initials: K
authors.lastname: Nomura
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D006358:Hot Temperature; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D017895:Manganese Compounds / Q000737:chemistry*; D033363:Neutron Diffraction / Q000379:methods*; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D017895:Manganese Compounds; D003035:Cobalt; D007501:Iron